Measurement of electrons from beauty-hadron decays in p-Pb collisions at √<SUP>S</SUP>NN=5.02 TeV and Pb-Pb collisions at. √<SUP>S</SUP>NN=2.76 TeV



Adam, J, Adamova, D, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Aiola, S
et al (show 999 more authors) (2017) Measurement of electrons from beauty-hadron decays in p-Pb collisions at √<SUP>S</SUP>NN=5.02 TeV and Pb-Pb collisions at. √<SUP>S</SUP>NN=2.76 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2017 (7). 52-.

Access the full-text of this item by clicking on the Open Access link.
[img] Text
Measurement of electrons from beauty-hadron decays in p–Pb collisions at √sNN = 5.02 TeV and Pb–Pb collisions at √sNN = 2.76 TeV.pdf - Author Accepted Manuscript

Download (489kB)

Abstract

The production of beauty hadrons was measured via semi-leptonic decays at mid-rapidity with the ALICE detector at the LHC in the transverse momentum interval 1<pT< 8 GeV/c in minimum-bias p-Pb collisions at sNN=5.02 TeV and in 1.3 < pT< 8 GeV/c in the 20% most central Pb-Pb collisions at sNN=2.76 TeV. The pp reference spectra at sNN=5.02 TeV and s=2.76 TeV, needed for the calculation of the nuclear modification factors RpPb and RPbPb, were obtained by a pQCD-driven scaling of the cross section of electrons from beauty-hadron decays measured at s=7 TeV. In the pT interval 3 < pT< 8 GeV/c, a suppression of the yield of electrons from beauty-hadron decays is observed in Pb-Pb compared to pp collisions. Towards lower pT, the RPbPb values increase with large systematic uncertainties. The RpPb is consistent with unity within systematic uncertainties and is well described by theoretical calculations that include cold nuclear matter effects in p-Pb collisions. The measured RpPb and these calculations indicate that cold nuclear matter effects are small at high transverse momentum also in Pb-Pb collisions. Therefore., the observed reduction of RPbPb below unity at high pT may be ascribed to an effect of the hot and dense medium formed in Pb-Pb collisions.[Figure not available: see fulltext.]

Item Type: Article
Uncontrolled Keywords: Heavy Ion Experiments
Depositing User: Symplectic Admin
Date Deposited: 22 Aug 2017 07:59
Last Modified: 14 Mar 2024 21:30
DOI: 10.1007/JHEP07(2017)052
Open Access URL: http://doi.org/10.1007/JHEP07(2017)052
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3009079